I agree with the rest that say not to do it. I'm not exactly "pro-animal", I mean I believe in treating them with respect and acknowledging that they're living beings etc, but I still see myself "above" them I guess you could say? Stopping a rooster from crowing is something that should never be done in my opinion, it isn't just noise and I'll always tell people what the others said. "If you don't like it, then get rid of him." Someone else may like it anyway, I know I love hearing the sounds of a rooster crowing. Especially gamefowl since they have a very distinct crow, kind of melodious unlike most farm breeds that have the deep-horse like crows. Can't think of a better day than a bright sun, in a semi-cool fall day with 20 different gamecocks sounding off their crows answering back to each other all day long while the hens cluck and the small song birds in the trees around here chirp away with a gentle breeze blowing.
-Daniel